Instruction manual

11 - 69
11. OPTIONS AND AUXILIARY EQUIPMENT
Table 11.4 Servo motor's leakage current example (Igm) Table 11.5 Servo amplifier's leakage current example (Iga)
Servo motor output [kW] Leakage current [mA]
Servo amplifier capacity
[kW]
Leakage current [mA]
0.05 to 1 0.1 0.1 to 0.6 0.1
2 0.2 0.75 to 3.5 0.15
3.5 0.3 5 72
50.5
11 15 5.5
70.7
22 7
11 1.0
Table 11.6 Leakage circuit breaker selection example
15 1.3
22 2.3
Servo amplifier
Rated sensitivity current of
leakage circuit breaker [mA]
MR-J3-10B to MR-J3-350B
MR-J3-10B1 to MR-J3-40B1
15
MR-J3-500B 30
MR-J3-700B 50
MR-J3-11KB(4) to MR-J3-22KB(4) 100
(2) Selection example
Indicated below is an example of selecting a leakage current breaker under the following conditions:
M
NV
Ig1 Iga Ig2 Igm
Servo
amplifier
MR-J3-40B
2mm
2
5m 2mm
2
5m
Servo motor
HF-KP43
Use a leakage current breaker generally available.
Find the terms of Equation (11.2) from the diagram:
Ig1
20
1000
5
0.1
[mA]
Ig2
20
1000
5
0.1
[mA]
Ign 0 (not used)
Iga
0.1 [mA]
Igm
0.1 [mA]
Insert these values in Equation (11.2):
Ig
10
{0.1
0 0.1 1 (0.1 0.1)}
4.0 [mA]
According to the result of calculation, use a leakage current breaker having the rated sensitivity current (Ig)
of 4.0[mA] or more. A leakage current breaker having Ig of 15[mA] is used with the NV-SP/SW/CP/CW/HW
series.